Method for transmitting and displaying object tracking information and system thereof

Abstract

A method for transmitting and displaying an object tracking information includes steps of capturing an image by a camera, wherein an object exists in the image; analyzing the image by the camera to obtain a 3D world coordinate information of the object; transmitting a projection matrix and the 3D world coordinate information to a display device by the camera; using the projection matrix to convert the 3D world coordinate information into a 2D image coordinate information by the display device; and displaying a pattern corresponding to the object according to the 2D image coordinate information by the display device.

What is claimed is: 
     
       1. A method for transmitting and displaying an object tracking information comprising steps of:
 capturing an image by a camera, wherein an object exists in the image; 
 analyzing the image by the camera to obtain a 3D world coordinate information of the object; 
 transmitting a projection matrix and the 3D world coordinate information to a display device by the camera; 
 using the projection matrix to convert the 3D world coordinate information into a 2D image coordinate information by the display device through 
 
       
         
           
             
               
                 
                   ( 
                   
                     
                       
                         x 
                       
                     
                     
                       
                         y 
                       
                     
                     
                       
                         w 
                       
                     
                   
                   ) 
                 
                 = 
                 
                   
                     P 
                     
                       3 
                       × 
                       4 
                     
                   
                   ⁡ 
                   
                     ( 
                     
                       
                         
                           X 
                         
                       
                       
                         
                           Y 
                         
                       
                       
                         
                           Z 
                         
                       
                       
                         
                           T 
                         
                       
                     
                     ) 
                   
                 
               
               , 
             
           
         
       
       wherein P 3×4  represents the projection matrix of the camera, (x, y, w) represents a 2D homogeneous coordinate, and (X, Y, Z, T) represents a 3D homogeneous coordinate, X, Y and Z of (X, Y, Z, T) are the 3D world coordinate information, x and y of (x, y, w) are the 2D image coordinate information, and T of (X, Y, Z, T) and w of (x, y, w) are scaling factors for homogeneous coordinate; and
 displaying a pattern corresponding to the object according to the 2D image coordinate information by the display device. 
 
     
     
       2. The method of  claim 1 , further comprising step of:
 expanding the 2D image coordinate information into a frame with a predetermined real length by the display device. 
 
     
     
       3. The method of  claim 1 , further comprising step of:
 displaying the pattern on a top or a bottom of the object by the display device. 
 
     
     
       4. The method of  claim 1 , wherein the 3D world coordinate information comprises a height of the object and the method further comprises steps of:
 when the height is larger than or equal to a predetermined height, displaying the pattern with a first size by the display device; and 
 when the height is smaller than the predetermined height, displaying the pattern with a second size by the display device, wherein the second size is smaller than the first size. 
 
     
     
       5. The method of  claim 1 , wherein the 3D world coordinate information comprises a height of the object and the method further comprises steps of:
 when the height is larger than or equal to a predetermined height, displaying the pattern with a first shape by the display device; and 
 when the height is smaller than the predetermined height, displaying the pattern with a second shape by the display device, wherein the second shape is different from the first shape. 
 
     
     
       6. The method of  claim 1 , further comprising step of:
 transmitting the image to the display device by the camera; and 
 displaying the image by the display device; 
 wherein the pattern is displayed on the image. 
 
     
     
       7. A system for transmitting and displaying an object tracking information comprising:
 a camera capturing an image, an object existing in the image, the camera analyzing the image to obtain a 3D world coordinate information of the object; and 
 a display device communicating with the camera, the camera transmitting a projection matrix and the 3D world coordinate information to the display device, the display device using the projection matrix to convert the 3D world coordinate information into a 2D image coordinate information through 
 
       
         
           
             
               
                 
                   ( 
                   
                     
                       
                         x 
                       
                     
                     
                       
                         y 
                       
                     
                     
                       
                         w 
                       
                     
                   
                   ) 
                 
                 = 
                 
                   
                     P 
                     
                       3 
                       × 
                       4 
                     
                   
                   ⁡ 
                   
                     ( 
                     
                       
                         
                           X 
                         
                       
                       
                         
                           Y 
                         
                       
                       
                         
                           Z 
                         
                       
                       
                         
                           T 
                         
                       
                     
                     ) 
                   
                 
               
               , 
             
           
         
       
       wherein P 3×4  represents the projection matrix of the camera, (x, y, w) represents a 2D homogeneous coordinate, and (X, Y, Z, T) represents a 3D homogeneous coordinate, X, Y and Z of (X, Y, Z, T) are the 3D world coordinate information, x and y of (x, y, w) are the 2D image coordinate information, and T of (X, Y, Z, T) and w of (x, y, w) are scaling factors for homogeneous coordinate, the display device displaying a pattern corresponding to the object according to the 2D image coordinate information. 
     
     
       8. The system of  claim 7 , wherein the display device expands the 2D image coordinate information into a frame with a predetermined real length. 
     
     
       9. The system of  claim 7 , wherein the display device displays the pattern on a top or a bottom of the object. 
     
     
       10. The system of  claim 7 , wherein the 3D world coordinate information comprises a height of the object; when the height is larger than or equal to a predetermined height, the display device displays the pattern with a first size; when the height is smaller than the predetermined height, the display device displays the pattern with a second size; and the second size is smaller than the first size. 
     
     
       11. The system of  claim 7 , wherein the 3D world coordinate information comprises a height of the object; when the height is larger than or equal to a predetermined height, the display device displays the pattern with a first shape; when the height is smaller than the predetermined height, the display device displays the pattern with a second shape; and the second shape is different from the first shape. 
     
     
       12. The system of  claim 7 , wherein the camera transmits the image to the display device, the display device displays the image, and the display device displays the pattern on the image.